1020203322251 has 16 divisors (see below), whose sum is σ = 1046485440000. Its totient is φ = 994038652320.

The previous prime is 1020203322239. The next prime is 1020203322277. The reversal of 1020203322251 is 1522233020201.

It is a cyclic number.

It is not a de Polignac number, because 1020203322251 - 2²² = 1020199127947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1020203342251) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 136041500 + ... + 136048998.

It is an arithmetic number, because the mean of its divisors is an integer number (65405340000).

Almost surely, 2^{1020203322251} is an apocalyptic number.

1020203322251 is a deficient number, since it is larger than the sum of its proper divisors (26282117749).

1020203322251 is an equidigital number, since it uses as much as digits as its factorization.

1020203322251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14866.

The product of its (nonzero) digits is 1440, while the sum is 23.

Adding to 1020203322251 its reverse (1522233020201), we get a palindrome (2542436342452).

The spelling of 1020203322251 in words is "one trillion, twenty billion, two hundred three million, three hundred twenty-two thousand, two hundred fifty-one".