30000001021261 has 2 divisors, whose sum is σ = 30000001021262. Its totient is φ = 30000001021260.

The previous prime is 30000001021231. The next prime is 30000001021381. The reversal of 30000001021261 is 16212010000003.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29091934965636 + 908066055625 = 5393694^2 + 952925^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30000001021261 is a prime.

It is a super-2 number, since 2×30000001021261² (a number of 28 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30000001021231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15000000510630 + 15000000510631.

It is an arithmetic number, because the mean of its divisors is an integer number (15000000510631).

Almost surely, 2^{30000001021261} is an apocalyptic number.

It is an amenable number.

30000001021261 is a deficient number, since it is larger than the sum of its proper divisors (1).

30000001021261 is an equidigital number, since it uses as much as digits as its factorization.

30000001021261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 72, while the sum is 16.

Adding to 30000001021261 its reverse (16212010000003), we get a palindrome (46212011021264).

The spelling of 30000001021261 in words is "thirty trillion, one million, twenty-one thousand, two hundred sixty-one".