1051021321421 has 16 divisors (see below), whose sum is σ = 1133163670464. Its totient is φ = 971282721024.

The previous prime is 1051021321417. The next prime is 1051021321447. The reversal of 1051021321421 is 1241231201501.

1051021321421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 1051021321421 - 2² = 1051021321417 is a prime.

It is a super-2 number, since 2×1051021321421² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1051021321411) 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, 2054906 + ... + 2514891.

It is an arithmetic number, because the mean of its divisors is an integer number (70822729404).

Almost surely, 2^{1051021321421} is an apocalyptic number.

It is an amenable number.

1051021321421 is a deficient number, since it is larger than the sum of its proper divisors (82142349043).

1051021321421 is a wasteful number, since it uses less digits than its factorization.

1051021321421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4570060.

The product of its (nonzero) digits is 480, while the sum is 23.

Adding to 1051021321421 its reverse (1241231201501), we get a palindrome (2292252522922).

The spelling of 1051021321421 in words is "one trillion, fifty-one billion, twenty-one million, three hundred twenty-one thousand, four hundred twenty-one".