21121020302 has 8 divisors (see below), whose sum is σ = 31710572712. Its totient is φ = 10550829400.

The previous prime is 21121020259. The next prime is 21121020307. The reversal of 21121020302 is 20302012112.

It is a happy number.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (21121020307) 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, 4837649 + ... + 4842012.

It is an arithmetic number, because the mean of its divisors is an integer number (3963821589).

Almost surely, 2^21121020302 is an apocalyptic number.

21121020302 is a deficient number, since it is larger than the sum of its proper divisors (10589552410).

21121020302 is a wasteful number, since it uses less digits than its factorization.

21121020302 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9680754.

The product of its (nonzero) digits is 48, while the sum is 14.

Adding to 21121020302 its reverse (20302012112), we get a palindrome (41423032414).

The spelling of 21121020302 in words is "twenty-one billion, one hundred twenty-one million, twenty thousand, three hundred two".