1621051022 has 4 divisors (see below), whose sum is σ = 2431576536. Its totient is φ = 810525510.

The previous prime is 1621050983. The next prime is 1621051037. The reversal of 1621051022 is 2201501261.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 2201501261 = 23117 ⋅95233.

It is a junction number, because it is equal to n+sod(n) for n = 1621050985 and 1621051003.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 405262754 + ... + 405262757.

It is an arithmetic number, because the mean of its divisors is an integer number (607894134).

Almost surely, 2^1621051022 is an apocalyptic number.

1621051022 is a deficient number, since it is larger than the sum of its proper divisors (810525514).

1621051022 is an equidigital number, since it uses as much as digits as its factorization.

1621051022 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 810525513.

The product of its (nonzero) digits is 240, while the sum is 20.

The square root of 1621051022 is about 40262.2779037650. The cubic root of 1621051022 is about 1174.7142258392.

Adding to 1621051022 its reverse (2201501261), we get a palindrome (3822552283).

The spelling of 1621051022 in words is "one billion, six hundred twenty-one million, fifty-one thousand, twenty-two".