21077152107 has 8 divisors (see below), whose sum is σ = 30657675840. Its totient is φ = 12774031560.

The previous prime is 21077152093. The next prime is 21077152133. The reversal of 21077152107 is 70125177012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 21077152107 - 2¹⁰ = 21077151083 is a prime.

It is a super-2 number, since 2×21077152107² (a number of 21 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 638701579 = 21077152107 / (2 + 1 + 0 + 7 + 7 + 1 + 5 + 2 + 1 + 0 + 7).

It is not an unprimeable number, because it can be changed into a prime (21077152807) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 319350757 + ... + 319350822.

It is an arithmetic number, because the mean of its divisors is an integer number (3832209480).

Almost surely, 2^21077152107 is an apocalyptic number.

21077152107 is a deficient number, since it is larger than the sum of its proper divisors (9580523733).

21077152107 is a wasteful number, since it uses less digits than its factorization.

21077152107 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 638701593.

The product of its (nonzero) digits is 6860, while the sum is 33.

The spelling of 21077152107 in words is "twenty-one billion, seventy-seven million, one hundred fifty-two thousand, one hundred seven".