31421022221040 has 40 divisors (see below), whose sum is σ = 97405168885968. Its totient is φ = 8378939258880.

The previous prime is 31421022221021. The next prime is 31421022221047. The reversal of 31421022221040 is 4012222012413.

It is a tau number, because it is divible by the number of its divisors (40).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 31421022221040.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31421022221047) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65460462721 + ... + 65460463200.

Almost surely, 2^{31421022221040} is an apocalyptic number.

31421022221040 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

31421022221040 is an abundant number, since it is smaller than the sum of its proper divisors (65984146664928).

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

31421022221040 is a wasteful number, since it uses less digits than its factorization.

31421022221040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 130920925937 (or 130920925931 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 24.

Adding to 31421022221040 its reverse (4012222012413), we get a palindrome (35433244233453).

The spelling of 31421022221040 in words is "thirty-one trillion, four hundred twenty-one billion, twenty-two million, two hundred twenty-one thousand, forty".