102001221020002 has 32 divisors (see below), whose sum is σ = 164477341712304. Its totient is φ = 47269173657600.

The previous prime is 102001221019987. The next prime is 102001221020003. The reversal of 102001221020002 is 200020122100201.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 74885987161561 + 27115233858441 = 8653669^2 + 5207229^2 .

It is not an unprimeable number, because it can be changed into a prime (102001221020003) 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, 30465499 + ... + 33647422.

Almost surely, 2^{102001221020002} is an apocalyptic number.

102001221020002 is a deficient number, since it is larger than the sum of its proper divisors (62476120692302).

102001221020002 is a wasteful number, since it uses less digits than its factorization.

102001221020002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 64113654.

The product of its (nonzero) digits is 32, while the sum is 13.

Adding to 102001221020002 its reverse (200020122100201), we get a palindrome (302021343120203).

The spelling of 102001221020002 in words is "one hundred two trillion, one billion, two hundred twenty-one million, twenty thousand, two".