1002122100021 has 48 divisors (see below), whose sum is σ = 1570549746240. Its totient is φ = 566670504960.

The previous prime is 1002122100011. The next prime is 1002122100043. The reversal of 1002122100021 is 1200012212001.

It is not a de Polignac number, because 1002122100021 - 2¹¹ = 1002122097973 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1002122100011) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 14577951 + ... + 14646531.

It is an arithmetic number, because the mean of its divisors is an integer number (32719786380).

Almost surely, 2^{1002122100021} is an apocalyptic number.

It is an amenable number.

1002122100021 is a deficient number, since it is larger than the sum of its proper divisors (568427646219).

1002122100021 is a wasteful number, since it uses less digits than its factorization.

1002122100021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 69634 (or 69627 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 12.

Adding to 1002122100021 its reverse (1200012212001), we get a palindrome (2202134312022).

The spelling of 1002122100021 in words is "one trillion, two billion, one hundred twenty-two million, one hundred thousand, twenty-one".