31420120200 has 192 divisors, whose sum is σ = 111819509760. Its totient is φ = 7149323520.

The previous prime is 31420120183. The next prime is 31420120217. The reversal of 31420120200 is 202102413.

It is an interprime number because it is at equal distance from previous prime (31420120183) and next prime (31420120217).

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 31420120200.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 919827 + ... + 953373.

It is an arithmetic number, because the mean of its divisors is an integer number (582393280).

Almost surely, 2^31420120200 is an apocalyptic number.

31420120200 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31420120200, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55909754880).

31420120200 is an abundant number, since it is smaller than the sum of its proper divisors (80399389560).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

31420120200 is a wasteful number, since it uses less digits than its factorization.

31420120200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33796 (or 33787 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 15.

Adding to 31420120200 its reverse (202102413), we get a palindrome (31622222613).

The spelling of 31420120200 in words is "thirty-one billion, four hundred twenty million, one hundred twenty thousand, two hundred".