21020212202002 has 24 divisors (see below), whose sum is σ = 36150667775316. Its totient is φ = 9130951904256.

The previous prime is 21020212201999. The next prime is 21020212202021. The reversal of 21020212202002 is 20020221202012.

It can be written as a sum of positive squares in 6 ways, for example, as 4180753106721 + 16839459095281 = 2044689^2 + 4103591^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1829111223 + ... + 1829122714.

Almost surely, 2^{21020212202002} is an apocalyptic number.

21020212202002 is a deficient number, since it is larger than the sum of its proper divisors (15130455573314).

21020212202002 is a wasteful number, since it uses less digits than its factorization.

21020212202002 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3658233982 (or 3658233969 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 16.

Adding to 21020212202002 its reverse (20020221202012), we get a palindrome (41040433404014).

The spelling of 21020212202002 in words is "twenty-one trillion, twenty billion, two hundred twelve million, two hundred two thousand, two".