21122053 has 4 divisors (see below), whose sum is σ = 22233760. Its totient is φ = 20010348.

The previous prime is 21122033. The next prime is 21122069. The reversal of 21122053 is 35022112.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 21122053 - 2¹³ = 21113861 is a prime.

It is a super-2 number, since 2×21122053² = 892282245869618, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21122033) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 555825 + ... + 555862.

It is an arithmetic number, because the mean of its divisors is an integer number (5558440).

Almost surely, 2^21122053 is an apocalyptic number.

It is an amenable number.

21122053 is a deficient number, since it is larger than the sum of its proper divisors (1111707).

21122053 is a wasteful number, since it uses less digits than its factorization.

21122053 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1111706.

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 21122053 is about 4595.8734751949. The cubic root of 21122053 is about 276.4258854121.

Adding to 21122053 its reverse (35022112), we get a palindrome (56144165).

The spelling of 21122053 in words is "twenty-one million, one hundred twenty-two thousand, fifty-three".