1020251155434 has 16 divisors (see below), whose sum is σ = 2332002641088. Its totient is φ = 291500330112.

The previous prime is 1020251155423. The next prime is 1020251155487. The reversal of 1020251155434 is 4345511520201.

It is a junction number, because it is equal to n+sod(n) for n = 1020251155395 and 1020251155404.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12145847047 + ... + 12145847130.

It is an arithmetic number, because the mean of its divisors is an integer number (145750165068).

Almost surely, 2^{1020251155434} is an apocalyptic number.

1020251155434 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

1020251155434 is an abundant number, since it is smaller than the sum of its proper divisors (1311751485654).

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

1020251155434 is a wasteful number, since it uses less digits than its factorization.

1020251155434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24291694189.

The product of its (nonzero) digits is 24000, while the sum is 33.

Adding to 1020251155434 its reverse (4345511520201), we get a palindrome (5365762675635).

The spelling of 1020251155434 in words is "one trillion, twenty billion, two hundred fifty-one million, one hundred fifty-five thousand, four hundred thirty-four".