101021902 has 4 divisors (see below), whose sum is σ = 151532856. Its totient is φ = 50510950.

The previous prime is 101021861. The next prime is 101021923. The reversal of 101021902 is 209120101.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 209120101 = 1787 ⋅117023.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25255474 + ... + 25255477.

It is an arithmetic number, because the mean of its divisors is an integer number (37883214).

Almost surely, 2^101021902 is an apocalyptic number.

101021902 is a deficient number, since it is larger than the sum of its proper divisors (50510954).

101021902 is an equidigital number, since it uses as much as digits as its factorization.

101021902 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50510953.

The product of its (nonzero) digits is 36, while the sum is 16.

The square root of 101021902 is about 10050.9652272804. The cubic root of 101021902 is about 465.7346109950.

The spelling of 101021902 in words is "one hundred one million, twenty-one thousand, nine hundred two".