1021420411 has 12 divisors (see below), whose sum is σ = 1181811400. Its totient is φ = 879690240.

The previous prime is 1021420369. The next prime is 1021420423. The reversal of 1021420411 is 1140241201.

It is a happy number.

It is not a de Polignac number, because 1021420411 - 2²¹ = 1019323259 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1021420451) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219846 + ... + 224443.

Almost surely, 2^1021420411 is an apocalyptic number.

1021420411 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1021420411 is a deficient number, since it is larger than the sum of its proper divisors (160390989).

1021420411 is a wasteful number, since it uses less digits than its factorization.

1021420411 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444330 (or 444319 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 1021420411 is about 31959.6685057902. The cubic root of 1021420411 is about 1007.0897536059.

Adding to 1021420411 its reverse (1140241201), we get a palindrome (2161661612).

It can be divided in two parts, 10214 and 20411, that added together give a square (30625 = 175²).

The spelling of 1021420411 in words is "one billion, twenty-one million, four hundred twenty thousand, four hundred eleven".