21431401040002 has 16 divisors (see below), whose sum is σ = 32305286894400. Its totient is φ = 10663020520528.

The previous prime is 21431401039999. The next prime is 21431401040003. The reversal of 21431401040002 is 20004010413412.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (21431401040003) 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, 11225398 + ... + 12995089.

It is an arithmetic number, because the mean of its divisors is an integer number (2019080430900).

Almost surely, 2^{21431401040002} is an apocalyptic number.

21431401040002 is a deficient number, since it is larger than the sum of its proper divisors (10873885854398).

21431401040002 is a wasteful number, since it uses less digits than its factorization.

21431401040002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24222665.

The product of its (nonzero) digits is 768, while the sum is 22.

Adding to 21431401040002 its reverse (20004010413412), we get a palindrome (41435411453414).

The spelling of 21431401040002 in words is "twenty-one trillion, four hundred thirty-one billion, four hundred one million, forty thousand, two".