21101054 has 16 divisors (see below), whose sum is σ = 34162128. Its totient is φ = 9717312.

The previous prime is 21101033. The next prime is 21101123. The reversal of 21101054 is 45010112.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21809 + ... + 22755.

It is an arithmetic number, because the mean of its divisors is an integer number (2135133).

Almost surely, 2^21101054 is an apocalyptic number.

21101054 is a deficient number, since it is larger than the sum of its proper divisors (13061074).

21101054 is a wasteful number, since it uses less digits than its factorization.

21101054 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1819.

The product of its (nonzero) digits is 40, while the sum is 14.

The square root of 21101054 is about 4593.5883577003. The cubic root of 21101054 is about 276.3342498776.

Adding to 21101054 its reverse (45010112), we get a palindrome (66111166).

The spelling of 21101054 in words is "twenty-one million, one hundred one thousand, fifty-four".