21469502101 has 2 divisors, whose sum is σ = 21469502102. Its totient is φ = 21469502100.

The previous prime is 21469502077. The next prime is 21469502123. The reversal of 21469502101 is 10120596412.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 14291007025 + 7178495076 = 119545^2 + 84726^2 .

It is a cyclic number.

It is not a de Polignac number, because 21469502101 - 2⁵ = 21469502069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (21469502161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10734751050 + 10734751051.

It is an arithmetic number, because the mean of its divisors is an integer number (10734751051).

Almost surely, 2^21469502101 is an apocalyptic number.

It is an amenable number.

21469502101 is a deficient number, since it is larger than the sum of its proper divisors (1).

21469502101 is an equidigital number, since it uses as much as digits as its factorization.

21469502101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The spelling of 21469502101 in words is "twenty-one billion, four hundred sixty-nine million, five hundred two thousand, one hundred one".