21101434152 has 16 divisors (see below), whose sum is σ = 52753585440. Its totient is φ = 7033811376.

The previous prime is 21101434139. The next prime is 21101434177. The reversal of 21101434152 is 25143410112.

It is a Harshad number since it is a multiple of its sum of digits (24), and also a Moran number because the ratio is a prime number: 879226423 = 21101434152 / (2 + 1 + 1 + 0 + 1 + 4 + 3 + 4 + 1 + 5 + 2).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 439613188 + ... + 439613235.

It is an arithmetic number, because the mean of its divisors is an integer number (3297099090).

Almost surely, 2^21101434152 is an apocalyptic number.

It is an amenable number.

21101434152 is an abundant number, since it is smaller than the sum of its proper divisors (31652151288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

21101434152 is a wasteful number, since it uses less digits than its factorization.

21101434152 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 879226432 (or 879226428 counting only the distinct ones).

The product of its (nonzero) digits is 960, while the sum is 24.

Adding to 21101434152 its reverse (25143410112), we get a palindrome (46244844264).

The spelling of 21101434152 in words is "twenty-one billion, one hundred one million, four hundred thirty-four thousand, one hundred fifty-two".