21671314122040 has 32 divisors (see below), whose sum is σ = 53193225573360. Its totient is φ = 7880477862400.

The previous prime is 21671314122023. The next prime is 21671314122047. The reversal of 21671314122040 is 4022141317612.

It is a super-2 number, since 2×21671314122040² (a number of 27 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 21671314121987 and 21671314122005.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21671314122047) 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, 24626492881 + ... + 24626493760.

Almost surely, 2^{21671314122040} is an apocalyptic number.

21671314122040 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

21671314122040 is an abundant number, since it is smaller than the sum of its proper divisors (31521911451320).

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

21671314122040 is a wasteful number, since it uses less digits than its factorization.

21671314122040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49252986663 (or 49252986659 counting only the distinct ones).

The product of its (nonzero) digits is 16128, while the sum is 34.

Adding to 21671314122040 its reverse (4022141317612), we get a palindrome (25693455439652).

The spelling of 21671314122040 in words is "twenty-one trillion, six hundred seventy-one billion, three hundred fourteen million, one hundred twenty-two thousand, forty".