211201231011220 has 48 divisors (see below), whose sum is σ = 447735026970000. Its totient is φ = 83678619248640.

The previous prime is 211201231011203. The next prime is 211201231011229. The reversal of 211201231011220 is 22110132102112.

It can be written as a sum of positive squares in 8 ways, for example, as 74106685458576 + 137094545552644 = 8608524^2 + 11708738^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (211201231011229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 8717095 + ... + 22324654.

It is an arithmetic number, because the mean of its divisors is an integer number (9327813061875).

Almost surely, 2^{211201231011220} is an apocalyptic number.

211201231011220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

211201231011220 is an abundant number, since it is smaller than the sum of its proper divisors (236533795958780).

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

211201231011220 is a wasteful number, since it uses less digits than its factorization.

211201231011220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31044988 (or 31044986 counting only the distinct ones).

The product of its (nonzero) digits is 96, while the sum is 19.

Adding to 211201231011220 its reverse (22110132102112), we get a palindrome (233311363113332).

The spelling of 211201231011220 in words is "two hundred eleven trillion, two hundred one billion, two hundred thirty-one million, eleven thousand, two hundred twenty".