211421010402 has 36 divisors (see below), whose sum is σ = 532867242726. Its totient is φ = 60406002720.

The previous prime is 211421010349. The next prime is 211421010439. The reversal of 211421010402 is 204010124112.

211421010402 is a `hidden beast` number, since 21 + 142 + 101 + 0 + 402 = 666.

211421010402 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 191142965601 + 20278044801 = 437199^2 + 142401^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 119852299 + ... + 119854062.

Almost surely, 2^211421010402 is an apocalyptic number.

211421010402 is an abundant number, since it is smaller than the sum of its proper divisors (321446232324).

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

211421010402 is a wasteful number, since it uses less digits than its factorization.

211421010402 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239706383 (or 239706373 counting only the distinct ones).

The product of its (nonzero) digits is 128, while the sum is 18.

Adding to 211421010402 its reverse (204010124112), we get a palindrome (415431134514).

The spelling of 211421010402 in words is "two hundred eleven billion, four hundred twenty-one million, ten thousand, four hundred two".