21061417401 has 6 divisors (see below), whose sum is σ = 30422047370. Its totient is φ = 14040944928.

The previous prime is 21061417393. The next prime is 21061417409. The reversal of 21061417401 is 10471416012.

21061417401 is a `hidden beast` number, since 2 + 1 + 0 + 614 + 1 + 7 + 40 + 1 = 666.

It is an interprime number because it is at equal distance from previous prime (21061417393) and next prime (21061417409).

It can be written as a sum of positive squares in only one way, i.e., 20978625600 + 82791801 = 144840^2 + 9099^2 .

It is not a de Polignac number, because 21061417401 - 2³ = 21061417393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (21061417409) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1170078736 + ... + 1170078753.

Almost surely, 2^21061417401 is an apocalyptic number.

It is an amenable number.

21061417401 is a deficient number, since it is larger than the sum of its proper divisors (9360629969).

21061417401 is a wasteful number, since it uses less digits than its factorization.

21061417401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2340157495 (or 2340157492 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 27.

The spelling of 21061417401 in words is "twenty-one billion, sixty-one million, four hundred seventeen thousand, four hundred one".