21121302 has 32 divisors (see below), whose sum is σ = 43912800. Its totient is φ = 6766848.

The previous prime is 21121277. The next prime is 21121319. The reversal of 21121302 is 20312112.

It is a super-2 number, since 2×21121302² = 892218796350408, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19224 + ... + 20292.

It is an arithmetic number, because the mean of its divisors is an integer number (1372275).

Almost surely, 2^21121302 is an apocalyptic number.

21121302 is an abundant number, since it is smaller than the sum of its proper divisors (22791498).

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

21121302 is a wasteful number, since it uses less digits than its factorization.

21121302 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1200.

The product of its (nonzero) digits is 24, while the sum is 12.

The square root of 21121302 is about 4595.7917707398. The cubic root of 21121302 is about 276.4226092422.

Adding to 21121302 its reverse (20312112), we get a palindrome (41433414).

The spelling of 21121302 in words is "twenty-one million, one hundred twenty-one thousand, three hundred two".