21002210199969 has 16 divisors (see below), whose sum is σ = 28012564277952. Its totient is φ = 13996665402048.

The previous prime is 21002210199959. The next prime is 21002210200019. The reversal of 21002210199969 is 96999101220012.

It is not a de Polignac number, because 21002210199969 - 2⁸ = 21002210199713 is a prime.

It is a super-2 number, since 2×21002210199969² (a number of 27 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (21002210199959) 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, 156156219 + ... + 156290655.

It is an arithmetic number, because the mean of its divisors is an integer number (1750785267372).

Almost surely, 2^{21002210199969} is an apocalyptic number.

It is an amenable number.

21002210199969 is a deficient number, since it is larger than the sum of its proper divisors (7010354077983).

21002210199969 is a wasteful number, since it uses less digits than its factorization.

21002210199969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 151936.

The product of its (nonzero) digits is 314928, while the sum is 51.

The spelling of 21002210199969 in words is "twenty-one trillion, two billion, two hundred ten million, one hundred ninety-nine thousand, nine hundred sixty-nine".